The Design Of Position Servo System Based On DSP

Recently, position servo control system has been widely used in most fields like NC machine tool, machining center, robot etc. As the development of computer control techniques, the servo control system is making towards the digitalized and modular design. This paper introduces design plan of DSP based high precision position servo system. The hardware design includes: the total project design, communication module design between DSP and main computer, motor driving circuit design and position measure and feedback module design. The power drives adopt SA60 servo amplifier module which can make the system simple frame and reliable performance.This paper also analyzes influencing factors of servo system precision includes sensor precision, reducer precision and control algorithm. In order to improve sensor precision, this paper brings forward an algorithm using two resolvers to feedback the position. The algorithm has proved to solve the resolver error in a certain range by experiment. This paper introduces two settlements of against the bug of the algorithm.Even if there is lots of new control-law today, PID control is still the most widely used. The paper firstly discusses basic PID control algorithm, PID parameter tuning and several extensive PID control algorithm. Fuzzy control system is particularly studied on the purpose of overcoming the unfavorable factors as the change the system parameters and nonlinearity etc. The paper describes the basic method of fuzzy control and designs fuzzy control unit and fuzzy-PID control unit with the simulation on Matlab platform, fuzzy-PID control is proved to be a satisfying effect in the situation of changing system parameters.